From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-5.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,MENTIONS_GIT_HOSTING,SPF_HELO_NONE,SPF_PASS autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id DE649C47254 for ; Tue, 5 May 2020 14:16:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id C4DCE2085B for ; Tue, 5 May 2020 14:16:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1730004AbgEEOQE (ORCPT ); Tue, 5 May 2020 10:16:04 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:49038 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-FAIL-OK-FAIL) by vger.kernel.org with ESMTP id S1729295AbgEEOQD (ORCPT ); Tue, 5 May 2020 10:16:03 -0400 Received: from Galois.linutronix.de (Galois.linutronix.de [IPv6:2a0a:51c0:0:12e:550::1]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id CC632C061A0F for ; Tue, 5 May 2020 07:16:02 -0700 (PDT) Received: from p5de0bf0b.dip0.t-ipconnect.de ([93.224.191.11] helo=nanos.tec.linutronix.de) by Galois.linutronix.de with esmtpsa (TLS1.2:DHE_RSA_AES_256_CBC_SHA256:256) (Exim 4.80) (envelope-from ) id 1jVyMK-0001mm-ND; Tue, 05 May 2020 16:15:44 +0200 Received: from nanos.tec.linutronix.de (localhost [IPv6:::1]) by nanos.tec.linutronix.de (Postfix) with ESMTP id 448D9FFC8D; Tue, 5 May 2020 16:15:44 +0200 (CEST) Message-Id: <20200505134926.578885807@linutronix.de> User-Agent: quilt/0.65 Date: Tue, 05 May 2020 15:49:26 +0200 From: Thomas Gleixner To: LKML Cc: x86@kernel.org, "Paul E. McKenney" , Andy Lutomirski , Alexandre Chartre , Frederic Weisbecker , Paolo Bonzini , Sean Christopherson , Masami Hiramatsu , Petr Mladek , Steven Rostedt , Joel Fernandes , Boris Ostrovsky , Juergen Gross , Brian Gerst , Mathieu Desnoyers , Josh Poimboeuf , Will Deacon Subject: [patch V4 part 4 00/24] x86/entry: Entry/exception code rework, nasty exceptions Content-transfer-encoding: 8-bit X-Linutronix-Spam-Score: -1.0 X-Linutronix-Spam-Level: - X-Linutronix-Spam-Status: No , -1.0 points, 5.0 required, ALL_TRUSTED=-1,SHORTCIRCUIT=-0.0001 Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Folks, This is the forth part of the rework series. Part 3 can be found here: https://lore.kernel.org/r/20200505134354.774943181@linutronix.de The series has a total of 138 patches and is split into 5 parts. The base for this 4th series is: git://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git entry-v4-part-3 The full series with all parts applied is available here: git://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git entry-v4-part-5 The forth part, i.e. this series is available from: git://git.kernel.org/pub/scm/linux/kernel/git/tglx/devel.git entry-v4-part-4 This part contains the modifications for complex and nasty exceptions and traps: - Conversion of int3 including a full isolation of the text poke handler so it is fully self contained, i.e does not call out into any instrumentable code. - Conversion of NMI handling including protection against instrumentation - Conversion of #DB with separation of the user and kernel mode entries - Conversion of #MC and #DF The objtool check for the noinstr.text correctness is not yet added to the build machinery and has to be invoked manually for now: objtool check -fal vmlinux.o The checking only works for builtin code as objtool cannot do a combined analysis of vmlinux.o and a module.o Thanks, tglx 8<---------- arch/x86/entry/entry_32.S | 38 ---- arch/x86/entry/entry_64.S | 35 +--- arch/x86/include/asm/desc.h | 8 arch/x86/include/asm/idtentry.h | 235 +++++++++++++++++++++++++++++ arch/x86/include/asm/mce.h | 2 arch/x86/include/asm/ptrace.h | 2 arch/x86/include/asm/text-patching.h | 11 - arch/x86/include/asm/traps.h | 23 -- arch/x86/kernel/alternative.c | 25 +-- arch/x86/kernel/cpu/common.c | 6 arch/x86/kernel/cpu/mce/core.c | 91 ++++++++--- arch/x86/kernel/cpu/mce/inject.c | 4 arch/x86/kernel/cpu/mce/internal.h | 2 arch/x86/kernel/cpu/mce/p5.c | 8 arch/x86/kernel/cpu/mce/winchip.c | 8 arch/x86/kernel/doublefault_32.c | 10 - arch/x86/kernel/hw_breakpoint.c | 6 arch/x86/kernel/idt.c | 22 +- arch/x86/kernel/nmi.c | 14 - arch/x86/kernel/traps.c | 283 ++++++++++++++++++++++++----------- arch/x86/kvm/vmx/vmx.c | 2 arch/x86/xen/enlighten_pv.c | 17 +- arch/x86/xen/xen-asm_64.S | 12 - include/linux/bsearch.h | 26 ++- kernel/time/timekeeping.c | 2 lib/bsearch.c | 22 -- 26 files changed, 615 insertions(+), 299 deletions(-)